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Inessa05 [86]
3 years ago
12

Angelica did an experiment where she measured the temperature outside her house each day for two weeks. She found that on the fi

rst day of her experiment, the temperature was 94°F, and it decreased by 3°F each day. Which equation represents t, the temperature outside Angelica's house on the dth day of her experiment?
A.
t = 94 - 3(d - 1)
B.
t = 94 + 3d
C.
t = 94 + 3(d - 1)
D.
t = 94 - 3d
Mathematics
1 answer:
USPshnik [31]3 years ago
3 0
I think it would be a
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(-9) x 7? Can't figure it out​
mihalych1998 [28]
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Explain 9x7 is 56 then you add a negative. Please thanks and brainliest if correct!
3 0
2 years ago
WILL GIVE BRAINLIEST IF CORRECT!!
vfiekz [6]

Answer:

\displaystyle y=-0.927x+13.63

Step-by-step explanation:

<u>Simple Linear Regression </u>

It a function that represents the relationship between two or more variables in a given data set. It uses the method of the least-squares regression line which minimizes the error between the estimate function and the real data.

Let's compute the best-fit line for the data

x=\{1,5,6,12,15\}

y=\{14,11,4,2,1\}

First, we find the sums

\displaystyle \sum x=1+5+6+12+15=39

\displaystyle \sum y=14+11+4+2+1=32

Then, we compute the averages values

\displaystyle \bar{x}=\frac{39}{5}=7.8

\displaystyle \bar{y}=\frac{32}{5}=6.4

We will also compute the sums of the cross-products and the sum of the squares

\displaystyle \sum xy=(1)(14)+(5)(11)+(6)(4)+(12)(2)+(15)(1)=137

\displaystyle \sum x^2=1^2+5^2+6^2+12^2+15^2=1+25+36+144+225

\displaystyle \sum x^2=431

We will compute Sxy and Sxx

\displaystyle S_{xy}=\sum xy-\frac{\sum x\ \sum y}{n}

\displaystyle S_{xy}=137-\frac{(39)(32)}{5}

\displaystyle S_{xy}=-117.6

\displaystyle S_{xx}=\sum x^2-\frac{(\sum x)^2}{n}

\displaystyle S_{xx}=431-\frac{39}{5}^2=126.8

The slope of the linear regression function is given by

\displaystyle m=\frac{S_{xy}}{S_{xx}}=\frac{-117.6}{126.8}=-0.927

The y-intercept ot the linear function is

\displaystyle b=\bar{y}-b\bar{x}=6.4-(-0.927)(7.8)

\displaystyle b=13.63

Thus the best-fit line is

\displaystyle y=-0.927x+13.63

The correct option is the last one

5 0
2 years ago
Just answer the questions please
Evgesh-ka [11]

Answer:

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252*7=1764 pound in each month

7 0
3 years ago
On Saturday, Enrique charges $2 for every 1/6 hour he spends running errands. He earned $50 last Saturday. He picked up dry clea
Harrizon [31]
Dear Amjelugo, we can subtract 4 from 50 to get $46. 4/6 hr= $8, 11/6 hr= $22, and 5/6 hr=$10. 10+22+8=$40 46-40=$6 $6=3/6 hr. Enrique walked Mrs. Camacho's dog and pick up her groceries for 3 hr.
7 0
3 years ago
Caleb's car used 8 gallons to travel 144 miles. How far can he travel on 20 gallons
V125BC [204]

Answer:

He will travel 360 miles.

Step-by-step explanation:

Divide 144 by 8. Then multiply your answer by 20.

7 0
2 years ago
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